ticket:10120: Add test for katakana + extend

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@33685 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10128: new BidiTest.txt with test data for more than 63 levels

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@33690 251d0590-4201-4cf1-90de-194747b24ca1